Jar-closure.



PATENTED MAY 5, 1908.

P. w. BBDPORD.

:JAR CLOSURE. APPLICATION FILED APB. 1,1907.

FREDERICK W. BEDFORD, OF OAK PARK, ILLINOIS.

JAR-CLOSURE Specification of Letters Patent.

Application filed. April 1, 1907.

Patented May 5, 1908..

Serial No. 365,711.

T 0 all whom it may concern:

Be it known that I, FREDERICK W. BED- ronn, a citizen of the UnitedStates, residing at Oak Park, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements in JarClosures, of which the following is a specification.

This invention relates to jar closures'and more particularly to devicesfor clamping the lids or covers to place.

The object of the invention is to promote a high degree of vacuum bypermitting the free egress of air or vapor. This is accomplished byproviding a clamping lever having a twopoint bearing, whereof onebearing develops a light pressure seal, which securely holds the lid orcover in position, but permits the free egress of air, and whereof theother bearing develops a heavy or maximum pressure which insures thehermetic sealing of the jar.

The nature, characteristic features and scope of the invention will bemore clearly understood from. the following description taken inconnection with the accompanying drawing, forming a part hereof, whereinFigure 1, is a perspective view of a jar with the improved closureapplied, the lever being shown in the maximum or heavy pressureposition. Fig. 2, is a sectional elevational view, with the lever set atthe light pressure position; and F ig. 3, is a similar view with thelever in its maximum pressure position.

Referring to the drawings 1, represents a jar of any suitable shape, 2,its lid or cover, 3, the complemental gasket, and 4, the usual swingingor pivotal spring bail the ends of which take into the recesses 5. Thelid or cover may be formed with a recess or way 6, to accommodate theclamping lever 8. The latter is served with trunnions 9, that may beaccommodated in the concavities or bearing surfaces 7. The bell-cranklever 8, is swung upon the bail 4, in the usual manner, but it differsfrom the known types of levers in that it is provided with an arm orprojection 10, which in length is slightly in excess of the distancebetween the bail and the top of the lid, so that when the parts areshifted to the posi tiontindicated in Fig. 2, with the shank of thelever substantially perpendicular to the cover and the nose or point oftheiprojection 10,

resting upon the cover, the lever will exert a light pressure, that isto say it will clamp the cover sufficiently to hold it in position butnot to interfere with the free egress of air during processing. Duringthis operation the trunnions 9, act as a check to any forward motion andit will be noticed that in the application of either pressure the springor bail is brought past the dead center, thus keeping it from returning.When the heavy or maximum pressure is to be applied to complete thesealing of the jar, the lever is swung on its trunnions to substantiallya horizontal position or until its part 11, bears against the lid.

Having described the nature and objects of the invention, what I claimas new and desire to secure by Letters Patent is:

1. The combination with a jar and its pivotal spring bail, of a coverhaving trunnion bearings and a way or recess, a gasket, and a clamplever mounted on the bail and having trunnions adapted to said bearings,said lever having a forwardly projecting nose or projection which takesinto said way and exerts a light pressure on the cover, when the handleof the lever is brought to a substantially per endicular position, andthe handle of the ever having a part adapted to take into said way andexert a heavy pressure when the handle assumes a substantiallyhorizontal position, substantially as specified.

2. The combination with a jar, of a cover having trunnion bearings, agasket, a spring bail pivoted to the jar, and a clamp lever swung on thebail and having trunnions adapted to said bearings, said lever havingarms whereof one is adapted to exert a light pressure when the handle isin a substantially perpendicular position, and whereof the other exertsa heavy pressure when the handle is in a substantially horizontalposition, and whereof in either application the bail is held past itsdead center, substantially as specified.

3. The combination with a jar, and its pivotal spring bail, of a lid orcover having trunnion bearings, a clamp lever mounted on the bail andhaving trunnions adapted to said bearings. the forward part of saidlever having an arm or projection which when the handle of the lever isbrought to a substan In testimony whereof I affix my signature tiallyperpendicular position bears With a in presence of tWo Witnesses. lightpressure against the cover, and the handle o the lever having a partadapted to FREDERICK BEDFORD' 5 exert a heavy pressure when insubstantially Witnesses:

a horizontal position, substantially as speei- FRANK G. NEWLAND,

fied. J AY D. MILLER.

